考虑储层倾角和水侵的边水气藏见水时间预测研究

发布时间：2018-05-30 07:58

本文选题：倾角 + 水侵　；参考：《石油钻探技术》2017年01期

【摘要】：目前的边水气藏见水时间预测都忽略储层倾角及水侵对水运移的影响,只考虑水质点舌进,故造成预测的见水时间与实际见水时间有较大差异。为了更准确地预测气井见水时间,基于物质平衡方程及多孔介质流体渗流理论,同时考虑储层倾角及水侵的影响,以质点流动驱动压力和沿倾角方向的重力为依据,将储层水的运移分为水侵阶段和舌进阶段,建立了带倾角边水气藏见水时间预测模型。利用该模型分析了储层倾角及水侵对见水时间的影响,结果发现:水侵速度与水侵时间呈反比;舌进时间随储层倾角增大先增长后缩短,两者之间呈复杂非线性关系。实例应用表明,利用新建模型预测的见水时间与实际见水时间更加接近,表明预测边水气藏见水时间时应该考虑储层倾角和水侵的影响。该预测模型为深入研究带倾角气藏边水推进机理、预测见水时间提供了理论依据,对边水气藏的开发管理具有指导意义。
[Abstract]:At present, the influence of reservoir dip angle and water invasion on water migration is ignored in the prediction of water discovery time of edge water gas reservoir, and only the point of tongue of water quality is considered, so there is a great difference between the predicted time of water discovery and the time of actual water discovery. In order to predict water breakthrough time of gas well more accurately, based on mass balance equation and porous fluid seepage theory, considering the influence of reservoir dip angle and water invasion at the same time, it is based on the driving pressure of particle flow and gravity along dip direction. The reservoir water migration is divided into the water invasion stage and the tongue advance stage, and a prediction model of the time of water vapor reservoir appearing along the obliquity edge is established. The model is used to analyze the influence of reservoir dip angle and water invasion on the water breakthrough time. The results show that the water invasion velocity is inversely proportional to the water invasion time, and the tongue entry time increases first and then shortens with the increase of reservoir dip angle, showing a complex nonlinear relationship between them. The practical application shows that the water breakthrough time predicted by the new model is closer to the actual water breakthrough time, which indicates that the influence of reservoir dip angle and water invasion should be taken into account in predicting the water breakthrough time of edge water gas reservoir. The prediction model provides a theoretical basis for further study on the propelling mechanism of edge water in gas reservoirs with dip angle and prediction of water breakthrough time. It is of guiding significance for the development and management of edge water gas reservoirs.
【作者单位】：中海石油(中国)有限公司上海分公司研究院;中国石化上海海洋油气分公司勘探开发研究院;
【基金】：国家科技重大专项“东海厚层非均质性大型气田有效开发关键技术”(编号:2016ZX05027004)资助
【分类号】：TE37

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